工控网络安全新兴理念及发展态势分析

随着数字技术的泛在化和网络攻击的与日俱增,加之AI和量子计算等颠覆性技术开始应用,常规网络安全防护理念及技术已不能满足新形势下关键基础设施工控网络安全的需求。本文描述了九位一体安全深度防护、设计安全、默认安全等新兴安全理念的概念、模型结构、特性及应用,并简要分析了边缘计算、AI、量子计算、分布式账簿、去中心化网络安全管理等新兴技术方面的发展态势。

上海内河船行波研究

船行波的大小直接影响到护岸设计的可靠性、经济性及环保性,国内外科研机构曾系统地开展船行波的研究,然而基于上海内河航道复合型断面形态、固定边界水域和有限水深等特点,已有的研究理论与公式并不完全适应。通过大量现场实船观测、数模和统计分析,研究和探讨对护岸防护更有现实意义的近岸侧船行波的波峰值、波谷值和护岸基础防护深度的计算公式,为上海内河航道甚至长三角限制性航道护岸设计提供技术参考。

Study of Pitting Morphology Fractal Characteristic of Corroded Surface of 304 Stainless Steel in FeCl_3 Environment

Experiments were performed to study the pitting corrosion morphology of 304 stainless steel exposed to FeCl 3 environments and SEM micrographs of the pitting corrosion morphology were obtained. The image processing technique combining with the fractal method was employed to analyze these pitting corrosion images and the self-similarity of pits morphology was observed. It indicates that fractal characteristics exist in pitting corrosion of 304 stainless steel. The self-similarity and complexity of the pitting morphology phenomenon were described in terms of fractal dimension which can also be an important parameter related to characterize pitting morphology qualitatively and quantitatively.